Amy: When there was a lice epidemic at my school, everybody got it except me. I tried to fool everyone by sprinkling sugar in my hair, but I just got attacked by bees.

Sheldon: I think I've come up with the perfect way for us to enjoy it.
Penny: Great. How?
Sheldon: We pretend we're aliens. We pretend we're aliens. I'm not the best at reading facial cues, but I'm gonna say that you love it and wanna hear more.

Amy: Have a seat on the floor.
Sheldon: Not there. That's my spot.

Sheldon: You're mean to me a lot. You think I don't notice all those sarcastic comments and those eye rolls, but I do. I have excellent peripheral vision. On a good day, I can see my ears.

Howard: Yeah, I wish Stuart would reopen, I hate this place, too.
Leonard: Okay, him I believe because he's an eighty-year-old man in a fifteen-year-old's t-shirt. You're just upset about Stuart, your mom and all their HBOs.

Penny: Okay, look, would it make you feel better if I did something dumb like sneak out of work one day to go audition for a Kevin Smith movie?
Leonard: That would be great, thank you!
Wil Wheaton: I'm just going to jump in here real quick. Leonard, a moment ago, you were dead set against Penny resuming her acting career, but now you're all for it. Is it fair to say that she played you like a violin?
Leonard: Yes, it is, Wil.

Kevin Smith: So, Penny, listen, I saw your movie.
Penny: Oh, wow. I wish it was better.
Wil Wheaton: Oh, don't worry about it. Have you seen some of Kevin's films?
Kevin Smith: You're cruisin' for a beatin', Wheaton.

Raj: Hang on. If you're really Nathan Fillion, what's the line from Firefly about your bonnet?
Customer: I swear by my pretty floral bonnet, I will end you.
Leonard: That's it. That's the line.
Raj: Although, I knew the line, doesn't make me Nathan Fillion.

Beverly Hofstadter: His name is Sigmund Freud.
Penny: Hey! Look at that. You both believe in Jewish bearded guys.
Mary Cooper: Stay out of this.
Penny: Uh-huh.

Howard: It's all defrosting.
Bernadette: It's okay, it's just food.
Howard: It's not just food. This is the last food my mother ever made. This is her last brisket. This is her last meatloaf. This is her last - I have no idea what this is. But, it's the last one.

Leonard: New salon topic: What's more important-- an idea or its execution?
Bernadette: Oh, that's fun.
Sheldon: Good for you, Leonard. That's a lovely little notion. Kind of like "I wish I could talk to my uncle in Chicago." Yeah, and I'll stand back while I invent the telephone. *holds invisible telephone to ear* Hello? Oh, hold on. Leonard, it's your uncle. He says you just got burned.

Raj: I know what it's like having to go through a loved one's possesions. My uncle was a worshipper of Krishna. But after he died, you know what we found? A statue of Shiva.
It might not be Crips & Bloods, but in India it's a thing.

Howard: A lot of ma's stuff brings back fond memories.
Bernadette: Is that why you couldn't get rid of her drawer full of ketchup packets?
Howard: Yes. It reminds me of us eating out, and her saying "Quick, no one's looking, fill your pockets with ketchup."

Sheldon: Well, now I have to correct you. As a bit of an elephant seal buff, the more accurate comparison would be when two mother seals actively seek to nourish the same pup. So I believe the term you're looking for is a double mother suckler
Leonard: Yeah, you're right. That is the term I'm looking for. You are a dirty double mother suckler!
Sheldon: Okay, well, now that we have the terminology straightened out, how dare you?

Howard: That is a good point. But I didn't marry you for good points. I married you to blindly support me no matter how ridiculous I'm being.
Bernadette: This is why I had to rewrite our wedding vows.